Performance of Double Binary Turbo Coding for Visible Light Communication Systems

다국어 초록 (Multilingual Abstract)

As increasing demand for high performance next generation communication systems, the improved wireless communication techniques are developing variously to transmit at longer distances and higher data rates. Wireless communication systems using visible light are at the forefront of possible the next generation wireless communication systems because visible light communication systems are based on using radiated Light Emitting Diode (LED) light. It has many good merits, for example, there are the only visible light communication that works information and illumination at the same time, the possibility of transmitting information in broadband, higher security, it does not harm human beings, it cannot cross Radio Frequency (RF) bands and there is no frequency permission and fee needed. However, visible light communication using LED light has some weaknesses which is to deteriorate the performance of communication. To reduce information losses caused by optical noise, such as incandescent lamps, fluorescent lamps, and sunlight, I propose channel coding scheme. In this paper, binary turbo codes and double binary turbo codes are used as channel coding scheme. Log MAP and Max-log MAP algorithm and SOVA are used in decoding part. Encoding and decoding of the proposed system is described and simulation results are analyzed. As the results simulated, if turbo codes are applied to communication system, performance is improved.

목차 (Table of Contents)

• CHAPTER I INTRODUCTION
• CHAPTER II VISIBLE LIGHT COMMUNICATION
• CHAPTER III SYSTEM MODEL
• A.Turbo Codes
• i.Encoding
• 1.Binary Turbo Codes
• 2.Double Binary Turbo Codes
• ii.Interleaver
• iii.Decoding
• 1.Max-Log MAP Algorithm
• 2.Soft Output Viterbi Algorithm (SOVA)
• B.Wireless Optical Channel Model
• CHAPTER IV SIMULATION RESULTS
• CHAPTER V CONCLUSIONS AND DISCUSSIONS
• REFERENCES